Letters written by Leeuwenhoek during Period 4

Alle de Brieven / Collected Letters has over 350 letters. However, only those in this chronology that Leeuwenhoek designated Letter 1, Letter 2, etc. did he consider to contain publishable microscopic observations.

Date
September 14, 1694 Wrote Letter 84 of 1694-09-14 (AB 139) to Richard Waller
November 30, 1694 Wrote Letter 85 of 1694-11-30 (AB 140) to Pieter Rabus
April 10, 1695 Wrote Letter 86 of 1695-04-10 (AB 141) to Anthonie Heinsius
April 22, 1695 Wrote Letter 87 of 1695-04-22 (AB 142) to Frederik Adriaan van Reede van Renswoude
May 1, 1695 Wrote Letter 88 of 1695-05-01 (AB 143) to Anthonie Heinsius
May 18, 1695 Wrote Letter 89 of 1695-05-18 (AB 144) to Frederik Adriaan van Reede van Renswoude
May 21, 1695 Wrote letter of 1695-05-21 (AB 145) to Pieter Rabus
May 23, 1695 Wrote letter of 1695-05-23 (AB 146) to Maarten Etienne van Velden
July 10, 1695 Wrote Letter 90 of 1695-07-10 (AB 147) to Frederik Adriaan van Reede van Renswoude
July 12, 1695 Wrote letter of 1695-07-12 (AB 148) to Maarten Etienne van Velden
July 20, 1695 Wrote Letter 91 of 1695-07-20 (AB 149) to Anthonie Heinsius
July 21, 1695 Wrote letter of 1695-07-21 (AB 150) to Pieter Rabus
August 15, 1695 Wrote Letter 92 of 1695-08-15 (AB 151) to Frederik Adriaan van Reede van Renswoude
August 15, 1695 Wrote letter of 1695-08-15 (AB 152) to Antonio Magliabechi
August 16, 1695 Wrote letter of 1695-08-16 (AB 153) to Antonio Magliabechi
August 18, 1695 Wrote Letter 93 of 1695-08-18 (AB 154) to Anthonie Heinsius
August 20, 1695 Wrote Letter 94 of 1695-08-20 (AB 155) to Frederik Adriaan van Reede van Renswoude
September 10, 1695 Wrote letter of 1695-09-10 (AB 156) to Pieter Rabus
September 18, 1695 Wrote Letter 95 of 1695-09-18 (AB 157) to Johann Wilhelm von Pfalz-Neuburg
October 18, 1695 Wrote letter of 1695-10-18 (AB 158) to Antonio Magliabechi
October 31, 1695 Wrote letter of 1695-10-31 (AB 159) to Antonio Magliabechi
November 3, 1695 Wrote Letter 96 of 1695-11-03 (AB 160) to Johann Wilhelm von Pfalz-Neuburg
December 1, 1695 Wrote letter of 1695-12-01 (AB 161) to Frederik Adriaan van Reede van Renswoude
December 22, 1695 Wrote letter of 1695-12-22 (AB 162) to Antonio Magliabechi
December 22, 1695 Wrote Letter 97 of 1695-12-22 (AB 163) to Hendrik van Bleyswijk
February 20, 1696 Wrote Letter 98 of 1696-02-20 (AB 164) to Frederik Adriaan van Reede van Renswoude
March 8, 1696 Wrote Letter 99 of 1696-03-08 (AB 165) to Nicolaas Witsen
June 1, 1696 Wrote letter of 1696-06-01 (AB 166) to Pieter Rabus
July 6, 1696 Wrote Letter 100 of 1696-07-06 (AB 167) to Nicolaas Witsen
July 10, 1696 Wrote Letter 102 of 1696-07-10 (AB 169) to Members of the Royal Society
July 10, 1696 Wrote Letter 101 of 1696-07-10 (AB 168) to Nicolaas Witsen
July 16, 1696 Wrote Letter 103 of 1696-07-16 (AB 170) to Frederik Adriaan van Reede van Renswoude
July 23, 1696 Wrote letter of 1696-07-23 (AB 171) to Pieter Rabus
August 26, 1696 Wrote Letter 104 of 1696-08-26 (AB 172) to Frederik Adriaan van Reede van Renswoude
August 28, 1696 Wrote letter of 1696-08-28 (AB 173) to Antonio Magliabechi
August 29, 1696 Wrote Letter 105 of 1696-08-29 (AB 174) to Hendrik van Bleyswijk
September 7, 1696 Wrote letter of 1696-09-07 (AB 175) to Antonio Magliabechi
September 12, 1696 Wrote Letter 106 of 1696-09-12 (AB 176) to Anthonie Heinsius
September 27, 1696 Wrote Letter 107 of 1696-09-27 (AB 177) to Hendrik van Bleyswijk
October 26, 1696 Wrote letter of 1696-10-26 (AB 178) to Maarten Etienne van Velden
October 30, 1696 Wrote letter of 1696-10-30 (AB 179) to N.N.
November 1, 1696 Wrote letter of 1696-11-01 (AB 180) to Harmen van Zoelen
February 12, 1697 Wrote letter of 1697-02-12 (AB 181) to Maarten Etienne van Velden
February 19, 1697 Wrote letter of 1697-02-19 (AB 182) to Hans Sloane
March 25, 1697 Wrote letter of 1697-03-25 (AB 183) to Members of the Royal Society
April 5, 1697 Wrote Letter 108 of 1697-04-05 (AB 184) to Members of the Royal Society
June 6, 1697 Wrote letter of 1697-06-06 (AB 185) to Antonio Magliabechi
July 1, 1697 Wrote letter of 1697-07-01 (AB 186) to N.N.
September 3, 1697 Wrote Letter 109 of 1697-09-03 (AB 187) to Jan van Leeuwen
September 10, 1697 Wrote Letter 110 of 1697-09-10 (AB 188) to Members of the Royal Society
November 2, 1697 Wrote letter of 1697-11-02 (AB 189) to Antonio Magliabechi
December 1, 1697 Wrote letter of 1697-12-01 (AB 190) to N.N.
February 20, 1698 Wrote letter of 1698-02-20 (AB 191) to Antonio Magliabechi
April 17, 1698 Wrote letter of 1698-04-17 (AB 192) to Antonio Magliabechi
May 9, 1698 Wrote Letter 111 of 1698-05-09 (AB 193) to Members of the Royal Society
August 14, 1698 Wrote letter of 1698-08-14 (AB 194) to Antonio Magliabechi
September 20, 1698 Wrote Letter 112 of 1698-09-20 (AB 195) to Anthonie Heinsius
December 17, 1698 Wrote Letter 113 of 1698-12-17 (AB 196) to Harmen van Zoelen
February 1, 1699 Wrote Letter 114 of 1699-02-01 (AB 197) to N.N.
February 28, 1699 Wrote letter of 1699-02-28 (AB 198) to Antonio Magliabechi
April 26, 1699 Wrote Letter 115 of 1699-04-26 (AB 199) to Harmen van Zoelen
June 9, 1699 Wrote Letter 116 of 1699-06-09 (AB 200) to Members of the Royal Society
June 23, 1699 Wrote Letter 117 of 1699-06-23 (AB 201) to Members of the Royal Society
August 5, 1699 Wrote Letter 118 of 1699-08-05 (AB 202) to N.N.
September 1, 1699 Wrote letter of 1699-09-01 (AB 203) to Hans Sloane
September 25, 1699 Wrote Letter 119 of 1699-09-25 (AB 204) to Members of the Royal Society
October 1, 1699 Wrote Letter 120 of 1699-10-01 (AB 205) to N.N.
October 16, 1699 Wrote Letter 121 of 1699-10-16 (AB 206) to Antonio Magliabechi
January 2, 1700 Wrote Letter 122 of 1700-01-02 (AB 207) to Hans Sloane
January 14, 1700 Wrote Letter 123 of 1700-01-14 (AB 208) to Nicolaes Boogaert van Belois
May 20, 1700 Wrote Letter 124 of 1700-05-20 (AB 209) to Hendrik van Bleyswijk
May 20, 1700 Wrote Letter 126 of 1700-05-20 (AB 210) to Anthonie Heinsius
June 2, 1700 Wrote Letter 125 of 1700-06-02 (AB 211) to Frederik Adriaan van Reede van Renswoude
June 14, 1700 Wrote Letter 127 of 1700-06-14 (AB 212) to Hans Sloane
June 16, 1700 Wrote Letter 133 of 1700-06-16 (AB 213) to N.N.
July 9, 1700 Wrote Letter 128 of 1700-07-09 (AB 214) to Hans Sloane
July 10, 1700 Wrote Letter 129 of 1700-07-10 (AB 215) to Anthonie Heinsius
July 27, 1700 Wrote Letter 130 of 1700-07-27 (AB 216) to Hans Sloane
August 1, 1700 Wrote Letter 131 of 1700-08-01 (AB 217) to N.N.
September 7, 1700 Wrote Letter 132 of 1700-09-07 (AB 218) to Hans Sloane
October 26, 1700 Wrote Letter 134 of 1700-10-26 (AB 219) to Hans Sloane
December 25, 1700 Wrote Letter 135 of 1700-12-25 (AB 220) to Hans Sloane
January 28, 1701 Wrote Letter 136 of 1701-01-28 (AB 221) to Hans Sloane
February 9, 1701 Wrote letter of 1701-02-09 (AB 222) to Frederik Adriaan van Reede van Renswoude
April 8, 1701 Wrote letter of 1701-04-08 (AB 223) to the Mayors of Delft
April 15, 1701 Wrote Letter 137 of 1701-04-15 (AB 224) to Members of the Royal Society
June 21, 1701 Wrote Letter 139 of 1701-06-21 (AB 225) to John Chamberlayne
June 21, 1701 Wrote Letter 138 of 1701-06-21 (AB 226) to Members of the Royal Society
June 21, 1701 Wrote letter of 1701-06-21 (AB 227) to Hans Sloane
August 2, 1701 Wrote Letter 140 of 1701-08-02 (AB 228) to Members of the Royal Society
August 26, 1701 Wrote Letter 141 of 1701-08-26 (AB 229) to Frederik Adriaan van Reede van Renswoude
December 6, 1701 Wrote letter of 1701-12-06 (AB 230) to Hans Sloane
December 6, 1701 Wrote Letter 142 of 1701-12-06 (AB 231) to John Somers
December 20, 1701 Wrote Letter 143 of 1701-12-20 (AB 232) to Members of the Royal Society
February 9, 1702 Wrote Letter 144 of 1702-02-09 (AB 233) to Hendrik van Bleyswijk
February 14, 1702 Wrote Letter 145 of 1702-02-14 (AB 234) to Members of the Royal Society
April 20, 1702 Wrote Letter 146 of 1702-04-20 (AB 235) to Karl von Hessen-Kassel
April 20, 1702 Wrote letter of 1702-04-20 (AB 236) to Karl von Hessen-Kassel